Thanks for the follow-up. Sounds like those with the carbon fiber roof must supply their own grounding bolt.

Personally, I ran the wires along the headliner, down the passenger side A-pillar, and to the fuse box, where I tapped into ignition power with an fuse tap (add-a-circuit). Very easy, completely invisible, absolutely no messing with the stock wiring, and can be returned entirely back to stock.

@TLud - I have to visit w/ you as I'm not handy at all! But am tired of I-35 patrols following alongside and espying my V1 knowingly ...